Mo. Rev. Stat. § 389.060: Ejection of passengers, when lawful.

If any passenger shall refuse to pay his fare, or shall behave in an offensive manner, or be guilty of repeated violations of the rules of the company, it shall be lawful for the conductor of the train and the servants of the corporation to put him and his baggage out of the cars, using no unnecessary force, at any usual stopping place, or near any dwelling house, as the conductor shall elect, on stopping the train.